[3.14] gh-150046: Fix test_add_python_opts to ignore PYTHON* env vars (GH-150089) (#150562)

miss-islington · pradyunsg · web-flow · commit d4e6dee0800f · 2026-05-28T17:15:20.000Z
gh-150046: Fix `test_add_python_opts` to ignore `PYTHON*` env vars (GH-150089) Avoid the runtime environment from affecting the tests' behaviours, which notably checks the warning filters which can be controlled by various PYTHON environment variables. (cherry picked from commit ef2246f) Co-authored-by: Pradyun Gedam <pradyunsg@gmail.com>
diff --git a/Lib/test/test_regrtest.py b/Lib/test/test_regrtest.py
@@ -2276,7 +2276,8 @@ def test_python_opts(self):
         proc = subprocess.run(cmd,
                               stdout=subprocess.PIPE,
                               stderr=subprocess.STDOUT,
-                              text=True)
+                              text=True,
+                              env=support.make_clean_env())
         self.assertEqual(proc.returncode, 0, proc)
 
     def test_add_python_opts(self):
